/Engine/Source/Runtime/Core/Public/Misc/StringFormatter.h
Format the specified string using the specified arguments. Replaces instances of {0} with indices from the given array matching the index specified in the token
A string containing the formatted text
[FString](API\Runtime\Core\Containers\FString) Format ( const TCHAR * InExpression, const [TArray](API\Runtime\Core\Containers\TArray)< [FStringFormatArg](API\Runtime\Core\Misc\FStringFormatArg) > & InArgs ) const